Rallye cluster gauge issues - 67 Barracuda
Unfortunately you need to dissassemble the face from the fuel gage and disable the built in IVR while leaving the part of the gage that works the fuel level needle alone. I used a small pair of miniature wire snippers to carefully unroll the edges and slide the face off. Mark the back of the gage face and gage housing in one spot so you can re crimp it back together in the same place on reassembly.
Your new IVR will mount on the exterior of the back of the instrument cluster. Why chrysler elected to mount it inside the gas gage on this type of gage panel is beyond me. The first pic says to remove the small black insulated wire, but also clip off and remove the bimetal point contactor that has the bare wire coil wrapped around it. Leave the 3 studs on the back of the gage as one is your tie in for the 12V feed, and the other is your 6V output, along with a ground. The remaining 3rd stud coming out of the gage not mentioned in my diagram is your sense wire that goes to the fuel sending unit. I also ended up threading in a stainless steel stud in the location shown as a dedicated ground.
The solid state chip you need is an NTE960 along with a small capacitor and will require come basic solder skills. See schematic and pix below. The NTE960 will take up to 35VDC input and drop it to 5.5VDC output. So running 12-13VDC through it is asking really nothing of it in the grand scheme of things. My wire color coding is red for 12V input, yellow for 6V output, black for ground. I was making these for awhile and selling them but this is a nice DIY weekend project.
(Note in the schematic it shows 2 grounds. The wired ground to the cluster, but also the chips mounting tab. The mounting tab is the second ground and must be grounded for the chip to work)
Unfortunately you need to dissassemble the face from the fuel gage and disable the built in IVR while leaving the part of the gage that works the fuel level needle alone. I used a small pair of miniature wire snippers to carefully unroll the edges and slide the face off. Mark the back of the gage face and gage housing in one spot so you can re crimp it back together in the same place on reassembly.
Your new IVR will mount on the exterior of the back of the instrument cluster. Why chrysler elected to mount it inside the gas gage on this type of gage panel is beyond me. The first pic says to remove the small black insulated wire, but also clip off and remove the bimetal point contactor that has the bare wire coil wrapped around it. Leave the 3 studs on the back of the gage as one is your tie in for the 12V feed, and the other is your 6V output, along with a ground. The remaining 3rd stud coming out of the gage not mentioned in my diagram is your sense wire that goes to the fuel sending unit. I also ended up threading in a stainless steel stud in the location shown as a dedicated ground.
The solid state chip you need is an NTE960 along with a small capacitor and will require come basic solder skills. See schematic and pix below. The NTE960 will take up to 35VDC input and drop it to 5.5VDC output. So running 12-13VDC through it is asking really nothing of it in the grand scheme of things. My wire color coding is red for 12V input, yellow for 6V output, black for ground. I was making these for awhile and selling them but this is a nice DIY weekend project.
(Note in the schematic it shows 2 grounds. The wired ground to the cluster, but also the chips mounting tab. The mounting tab is the second ground and must be grounded for the chip to work)
